Antiskid device for tires.



STA 111AENT OFFICE.

nm: C. POLENG, O! MENLO, IOWA, ASSIGNOR T0 6001)! AITI-SKID GRAINMANU!LG 'lUKING COJIPNY, 01. DES MOINES, IOW, A CORPORATION 01 ARIZONA:

mxsxm DEVICE FOR. TIBE8.

lpcctflcatlon of Letters Patent.

Patented J une 25, 1918.

Aplflmflon tlled Iu1y 815 1913. Serlal No. 112,274.

Be it known that I, Fana C. Po mso, citi zen of the United States ofAmerica, and resident of Meule, Guthrie county, Iowa, have invented anew and useful Antiskid Device for Tires, of which the following is aspecification.

The objt of this invention is to provide an improved construction for ananti-Bkid device for tires. K

A further object of this invention in to provide an improved treadattachment for non-skid chane employed on pneumatic tires.

My invention consiste in the construction, arrangement and combinationof elements hereinafler set forth, pointed out in my claims andillustrated by the aocompanying drawing, in which- Figure 1 is a sideelevation of a portion of a tire with non-skid chains and showing one ofmy improved devices in position for use. Fig. 2 is a plan view, on anenlarged scale, ofone of the-devices detaehed. Fig. 3 is a centralcross-section of the same. Fig. 4 in a plan view of a modified form ofthe device.

In the construction of the device as shown the numeral 10 designates atire which may be equipped u ith side chains 11, one of which is shown.My improvement consists of an antLskidding plate or mat adapted to beattached to the side chains 11 by means of diagonal] arranged connectingchains .l3 joinm t e corners of said plate and sald Bide c ains. Theplate proper consists of a body portion 14 of generally rectangularform, concavo-convex both longitudinally and transversely, and is formedwith a'relatively large a erture 15 in its central portian, and withlioles 16 at its corners for attachment of the eonnecting ehaii1s 13.Each of the connecting chains 13 preferably is provided with a hook 17(shown conventionally) at its opposite end for detachable nnection t ooneor another of the aide chane 11. Upstanding fianges 18, 19 are formedon the plate 14 at the side margins of the aperture 15, and parallelwith the path of t1avel of the tire in use, and the outer margins ofsaidflanges preferably are eurved on iras ecntric to the face of theplate. The plate 14 alflo is formed with upatai1d ingflang2fl 21 at itsends extending trnnwveriv 5:? ;the gath of traire! of the tire, andsaidend flahges also preferably have their outer margins eurved on arcseccentric to the face of the,late to prevent the, accumulation of mud heransverse end (langes 20, 21 extend{cross t planes ul the bide anges 19,19 and also -would be intercted by the longitudinal lamas, if extended,of aide corrugations ereinafter referred to, thus giving to said endflan es material and considerable com- 00 pass of t e tread surface overwhich the device is operated. Transver corru tions or c0ncmities 22, 23preferably are ormed in the body of the plate 14, parallel with andspaced inwardly from the end flangea 20, 21, 10

and similar longitudinal corrugations or concavities 24, 25 are formedin said plate parallel with and spaced outwardl from the central flanges18, 19. It is the nction of the corrugationa or concavities 22, 23, 24,25,

which may be pressed or stamped in the metal of the bod 14, to engagethe tire 10 and elevate said ody relative to the tire, to facilitate theconnection of the connectxng chains 13 thereto, and [ireVent 8aid chainsIiG from too intimate contact with said tire. The elevation of the platethrough the use of the concavities, taken with the aperture 15comprising a large art of the area of the plate, also revents t eaccumulation of mud,

grave] a the like between the late and tire. Th outer margins of theanges 18, 19, 20, 21 being curved' on arcs eccentric to the curvatur ofthe plate provides for the maximum penetration of said flaes the I0renters thereof; it saves material at the ends of the fianges where itwould be of little or no advantage on the viheels of motor vehicles; andit eliminates corners of said flanges whie hwould have atendency to bebmken or bent innse. The plate 14 may be curved in both directions tuconform in a general way to the curvature of the tire.

In the modification shown in Fig, 4 the flanges 18, 19 are curvedoutwardly slightl from the central aperture, and the en (langes 20, 21are curved on arallel arcs. This is of advantage where the evice is usedon paving, as the outer margina of the flangea are not so li"fifil topenetrate joints or cracks between t e paving members.

The anti-akid plate. may be attached and detached readily and connientlywhen desired, and are .ligned particularly for use un e longitudinal ouwhen tlm nmlinur chain dvvices are not suflicient tu Im pffectivn. Them1tstumling flangus oxtemling bath longitudinally and tmnsversely of thetroad provide an effective grip un Il|(e rond and prevent slipping orskitlding of tlm wl1eel cquipped t'herewith. J

t ils to be unrlerstood th at various modifications. may be employer],aside fmm the ing f-mm the spirit of my Invention.

I- daim as my invention I. A nnp-skitl athurhment fnr tires, comprisinga plate formed witha relatively large aperture in il.scentral portion,said platehoing formml with 10 itmlinal' and transvorse orrugution formij; ribs on one face"thcreof which rihs are adapted t0 engage il tire andelcvate the plate relative thercto.

2. .\n impmvud article 0f manufacture, lmving un nrcuate plate formedwith a relatively large oblong aperture in its central parfum, suit]plate also being formed with parallel longitudinal flanges adjacent; thesitlc nmr gins uf said aperture, said flanges being fi;rm l with theirouter margins on arcs acccntr tu t.he face Of the plate.

3. An imflrnved article nf manufacture, Imving a plate f0rmed withtransversely al mngml fianm:s adjacent its ends, the perpentlicularsurfaces of said flanges being curved on pumllel arcs.

Signcd by me at Des Moines, Iowa, this th day nf July, 1916.

FRED C. POLING.

